电力系统分析潮流计算的计算机算法

1、潮流计算的计算机算法实验报告姓名： 学号： 班级： 一、 实验目的掌握潮流计算的计算机算法。熟悉MATLAB，并掌握MATLAB程序的基本调试方法。二、 实验准备根据课程内容，熟悉MATLAB软件的使用方法，自行学习MATLAB程序的基础语法，并根据所学知识编写潮流计算牛顿拉夫逊法(或PQ分解法) 的计算程序，用相应的算例在MATLAB上进行计算、调试和验证。三、 实验要求每人一组，在实验课时内，用MATLAB调试和修改运行程序，用算例计算输出潮流结果。四、 实验程序clear; %清空内存n=input(请输入节点数:n=);n1=input(请输入支路数:n1=);isb=input(请输

2、入平衡节点号:isb=);pr=input(请输入误差精度:pr=);B1=input(请输入支路参数:B1=);B2=input(请输入节点参数:B2=);X=input(节点号和对地参数:X=);Y=zeros(n); Times=1; %一：创建节点导纳矩阵for i=1:n1 if B1(i,6)=0 %不含变压器的支路 p=B1(i,1); q=B1(i,2); Y(p,q)=Y(p,q)-1/B1(i,3); Y(q,p)=Y(p,q); Y(p,p)=Y(p,p)+1/B1(i,3)+0.5*B1(i,4); Y(q,q)=Y(q,q)+1/B1(i,3)+0.5*B1(i,4)

3、; else %含有变压器的支路 p=B1(i,1); q=B1(i,2); Y(p,q)=Y(p,q)-1/(B1(i,3)*B1(i,5); Y(q,p)=Y(p,q); Y(p,p)=Y(p,p)+1/B1(i,3); Y(q,q)=Y(q,q)+1/(B1(i,5)2*B1(i,3); endendY; %将OrgS、DetaS初始化 OrgS=zeros(2*n-2,1); DetaS=zeros(2*n-2,1); %二：创建OrgS，用于存储初始功率参数h=0;j=0;for i=1:n %对PQ节点的处理 if i=isb&B2(i,6)=2 h=h+1; for j=1:n

4、OrgS(2*h-1,1)=OrgS(2*h-1,1)+real(B2(i,3)*(real(Y(i,j)*real(B2(j,3)-imag(Y(i,j)*I mag(B2(j,3)+imag(B2(i,3)*(real(Y(i,j)*imag(B2(j,3)+imag(Y(i,j)*real(B2(j,3); OrgS(2*h,1)=OrgS(2*h,1)+imag(B2(i,3)*(real(Y(i,j)*real(B2(j,3)-imag(Y(i,j)*imag(B2(j,3)-real(B2(i,3)*(real(Y(i,j)*imag(B2(j,3)+imag(Y(i,j)*rea

5、l(B2(j,3); end endend%三：对PV节点的处理，注意这时不可再将h初始化为0for i=1:n if i=isb&B2(i,6)=3 h=h+1; for j=1:n OrgS(2*h-1,1)=OrgS(2*h-1,1)+real(B2(i,3)*(real(Y(i,j)*real(B2(j,3)-imag(Y(i,j)*imag(B2(j,3)+imag(B2(i,3)*(real(Y(i,j)*imag(B2(j,3)+imag(Y(i,j)*real(B2(j,3); OrgS(2*h,1)=OrgS(2*h,1)+imag(B2(i,3)*(real(Y(i,j)*

6、real(B2(j,3)-imag(Y(i,j)*imag(B2(j,3)-real(B2(i,3)*(real(Y(i,j)*imag(B2(j,3)+imag(Y(i,j)*real(B2(j,3); end endendOrgS;%四：创建PVU 用于存储PV节点的初始电压PVU=zeros(n-h-1,1);t=0;for i=1:n if B2(i,6)=3 t=t+1; PVU(t,1)=B2(i,3); endendPVU;%五：创建DetaS,用于存储有功功率、无功功率和电压幅值的不平衡量h=0;for i=1:n %对PQ节点的处理 if i=isb&B2(i,6)=2 h=

7、h+1; DetaS(2*h-1,1)=real(B2(i,2)-OrgS(2*h-1,1); DetaS(2*h,1)=imag(B2(i,2)-OrgS(2*h,1); endendt=0;for i=1:n %六：对PV节点的处理，注意这时不可再将h初始化为0 if i=isb&B2(i,6)=3 h=h+1; t=t+1; DetaS(2*h-1,1)=real(B2(i,2)-OrgS(2*h-1,1); DetaS(2*h,1)=real(PVU(t,1)2+imag(PVU(t,1)2-real(B2(i,3)2-imag( B2(i,3)2; endendDetaS;%七：创建

8、I，用于存储节点电流参数i=zeros(n-1,1);h=0;for i=1:n if i=isb h=h+1; I(h,1)=(OrgS(2*h-1,1)-OrgS(2*h,1)*sqrt(-1)/conj(B2(i,3); endendI;%八：创建Jacbi(雅可比矩阵)Jacbi=zeros(2*n-2);h=0;k=0;for i=1:n %对PQ节点的处理 if B2(i,6)=2 h=h+1; for j=1:n if j=isb k=k+1; if i=j %对角元素的处理 Jacbi(2*h-1,2*k-1)=-imag(Y(i,j)*real(B2(i,3)+real(Y(

9、i,j)*imag(B2(i,3)+imag(I(h,1); Jacbi(2*h-1,2*k)=real(Y(i,j)*real(B2(i,3)+imag(Y(i,j)*imag(B2(i,3)+real(I(h,1); Jacbi(2*h,2*k-1)=-Jacbi(2*h-1,2*k)+2*real(I(h,1); Jacbi(2*h,2*k)=Jacbi(2*h-1,2*k-1)-2*imag(I(h,1); else %非对角元素的处理 Jacbi(2*h-1,2*k-1)=-imag(Y(i,j)*real(B2(i,3)+real(Y(i,j)*imag(B2(i,3); Jacb

10、i(2*h-1,2*k)=real(Y(i,j)*real(B2(i,3)+imag(Y(i,j)*imag(B2(i,3); Jacbi(2*h,2*k-1)=-Jacbi(2*h-1,2*k); Jacbi(2*h,2*k)=Jacbi(2*h-1,2*k-1); end if k=(n-1) %将用于内循环的指针置于初始值，以确保雅可比矩阵换行 k=0; end end end endendk=0;for i=1:n %对PV节点的处理 if B2(i,6)=3 h=h+1; for j=1:n if j=isb k=k+1; if i=j %对角元素的处理 Jacbi(2*h-1,2*

11、k-1)=-imag(Y(i,j)*real(B2(i,3)+real(Y(i,j)*imag(B2(i,3)+imag(I(h,1); Jacbi(2*h-1,2*k)=real(Y(i,j)*real(B2(i,3)+imag(Y(i,j)*imag(B2(i,3)+real(I(h,1); Jacbi(2*h,2*k-1)=2*imag(B2(i,3); Jacbi(2*h,2*k)=2*real(B2(i,3); else %非对角元素的处理 Jacbi(2*h-1,2*k-1)=-imag(Y(i,j)*real(B2(i,3)+real(Y(i,j)*imag(B2(i,3); J

12、acbi(2*h-1,2*k)=real(Y(i,j)*real(B2(i,3)+imag(Y(i,j)*imag(B2(i,3); Jacbi(2*h,2*k-1)=0; Jacbi(2*h,2*k)=0; end if k=(n-1) %将用于内循环的指针置于初始值，以确保雅可比矩阵换行 k=0; end end end endendJacbi;%九：求解修正方程，获取节点电压的不平衡量DetaU=zeros(2*n-2,1);DetaU=inv(Jacbi)*DetaS;DetaU;%修正节点电压j=0;for i=1:n %对PQ节点处理 if B2(i,6)=2 j=j+1; B2(

13、i,3)=B2(i,3)+DetaU(2*j,1)+DetaU(2*j-1,1)*sqrt(-1); endendfor i=1:n %对PV节点的处理 if B2(i,6)=3 j=j+1; B2(i,3)=B2(i,3)+DetaU(2*j,1)+DetaU(2*j-1,1)*sqrt(-1); endendB2;%十：开始循环*while abs(max(DetaU)prOrgS=zeros(2*n-2,1); %!初始功率参数在迭代过程中是不累加的，所以在这里必须将其初始化为零矩阵h=0;j=0;for i=1:n if i=isb&B2(i,6)=2 h=h+1; for j=1:n

14、 OrgS(2*h-1,1)=OrgS(2*h-1,1)+real(B2(i,3)*(real(Y(i,j)*real(B2(j,3)-imag(Y(i,j)*imag(B2(j,3)+imag(B2(i,3)*(real(Y(i,j)*imag(B2(j,3)+imag(Y(i,j)*real(B2(j,3); OrgS(2*h,1)=OrgS(2*h,1)+imag(B2(i,3)*(real(Y(i,j)*real(B2(j,3)-imag(Y(i,j)*imag(B2(j,3)-real(B2(i,3)*(real(Y(i,j)*imag(B2(j,3)+imag(Y(i,j)*rea

15、l(B2(j,3); end endendfor i=1:n if i=isb&B2(i,6)=3 h=h+1; for j=1:n OrgS(2*h-1,1)=OrgS(2*h-1,1)+real(B2(i,3)*(real(Y(i,j)*real(B2(j,3)-imag(Y(i,j)*imag(B2(j,3)+imag(B2(i,3)*(real(Y(i,j)*imag(B2(j,3)+imag(Y(i,j)*real(B2(j,3); OrgS(2*h,1)=OrgS(2*h,1)+imag(B2(i,3)*(real(Y(i,j)*real(B2(j,3)-imag(Y(i,j)*i

16、mag(B2(j,3)-real(B2(i,3)*(real(Y(i,j)*imag(B2(j,3)+imag(Y(i,j)*real(B2(j,3); end endendOrgS;%创建DetaSh=0;for i=1:n if i=isb&B2(i,6)=2 h=h+1; DetaS(2*h-1,1)=real(B2(i,2)-OrgS(2*h-1,1); DetaS(2*h,1)=imag(B2(i,2)-OrgS(2*h,1); endendt=0;for i=1:n if i=isb&B2(i,6)=3 h=h+1; t=t+1; DetaS(2*h-1,1)=real(B2(i,

17、2)-OrgS(2*h-1,1); DetaS(2*h,1)=real(PVU(t,1)2+imag(PVU(t,1)2-real(B2(i,3)2-imag(B2(i,3)2; endendDetaS;%创建Ii=zeros(n-1,1);h=0;for i=1:n if i=isb h=h+1; I(h,1)=(OrgS(2*h-1,1)-OrgS(2*h,1)*sqrt(-1)/conj(B2(i,3); endendI;%创建JacbiJacbi=zeros(2*n-2);h=0;k=0;for i=1:n if B2(i,6)=2 h=h+1; for j=1:n if j=isb

18、k=k+1; if i=j Jacbi(2*h-1,2*k-1)=-imag(Y(i,j)*real(B2(i,3)+real(Y(i,j)*imag(B2(i,3)+imag(I(h,1); Jacbi(2*h-1,2*k)=real(Y(i,j)*real(B2(i,3)+imag(Y(i,j)*imag(B2(i,3)+real(I(h,1); Jacbi(2*h,2*k-1)=-Jacbi(2*h-1,2*k)+2*real(I(h,1); Jacbi(2*h,2*k)=Jacbi(2*h-1,2*k-1)-2*imag(I(h,1); else Jacbi(2*h-1,2*k-1)=

19、-imag(Y(i,j)*real(B2(i,3)+real(Y(i,j)*imag(B2(i,3); Jacbi(2*h-1,2*k)=real(Y(i,j)*real(B2(i,3)+imag(Y(i,j)*imag(B2(i,3); Jacbi(2*h,2*k-1)=-Jacbi(2*h-1,2*k); Jacbi(2*h,2*k)=Jacbi(2*h-1,2*k-1); end if k=(n-1) k=0; end end end endendk=0;for i=1:n if B2(i,6)=3 h=h+1; for j=1:n if j=isb k=k+1; if i=j Jacbi(2*h-1,2*k-1)=-imag(Y(i,j)*real(B2(i,3)+real(Y(i,j)*imag(B2(i,3)+imag(I(h,1); Jacbi(2*h-1,2*k)=real(Y(i,j)*real(B2(i,3)+imag(Y(i,j)*imag(B2(i,3)+real(I(h,1); Jacbi(2*h,2*k-1)=2*imag(B2(i,3); Jacbi(2*h,2*k)=2*real(B2(i,3); else Jacbi(2*h-1,2*k-1)=-imag(